syzkaller login: [ 38.723552] BUG: Bad rss-counter state mm:000000000eb1ea7e type:MM_FILEPAGES val:33 [ 38.724589] BUG: Bad rss-counter state mm:000000000eb1ea7e type:MM_ANONPAGES val:22 [ 38.887991] ================================================================== [ 38.888894] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.889851] Read of size 8 at addr ffff888016a3a310 by task sshd/219 [ 38.890629] [ 38.890963] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.891832] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.892808] Call Trace: [ 38.893154] [ 38.893437] dump_stack_lvl+0x91/0xf0 [ 38.893937] print_report+0xcc/0x620 [ 38.894423] ? __virt_addr_valid+0x102/0x340 [ 38.894979] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895616] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896236] kasan_report+0xbe/0xf0 [ 38.896712] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897363] vma_interval_tree_remove+0xc75/0xec0 [ 38.897970] vma_prepare+0xc54/0x11a0 [ 38.898447] __split_vma+0x5af/0x950 [ 38.898922] ? __pfx___split_vma+0x10/0x10 [ 38.899455] ? find_held_lock+0x2c/0x110 [ 38.899981] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.900553] ? lock_is_held_type+0x9f/0x120 [ 38.901101] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.901716] ? mtree_range_walk+0x632/0x900 [ 38.902274] ? mas_walk+0x5c7/0x7c0 [ 38.902757] do_vmi_munmap+0x1f1/0x2b0 [ 38.903257] mmap_region+0x1f9/0x2660 [ 38.903744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.904263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.904996] ? __pfx_lock_acquire+0x10/0x10 [ 38.905560] ? __pfx_mmap_region+0x10/0x10 [ 38.906091] ? security_mmap_addr+0x7d/0xa0 [ 38.906624] ? get_unmapped_area+0x1f5/0x3f0 [ 38.907177] do_mmap+0x854/0xf00 [ 38.907621] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.908127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.908696] ksys_mmap_pgoff+0x3af/0x500 [ 38.909220] do_syscall_64+0x3f/0x90 [ 38.909702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910362] RIP: 0033:0x7fe85da12d82 [ 38.910819] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.912969] RSP: 002b:00007fffff1feb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.913891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe85da12d82 [ 38.914738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe85ce4c000 [ 38.915591] RBP: 00007fe85ce4c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.916441] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f70577ec0 [ 38.917315] R13: 00007fffff1feb80 R14: 00007fffff1febb0 R15: 00007fffff1fef10 [ 38.918182] [ 38.918477] [ 38.918696] Allocated by task 212: [ 38.919128] kasan_save_stack+0x22/0x50 [ 38.919643] kasan_set_track+0x25/0x30 [ 38.920135] __kasan_slab_alloc+0x59/0x70 [ 38.920662] kmem_cache_alloc+0x16b/0x370 [ 38.921185] vm_area_dup+0x20/0x160 [ 38.921644] __split_vma+0x170/0x950 [ 38.922109] split_vma+0xc6/0x110 [ 38.922555] mprotect_fixup+0x8d2/0xb30 [ 38.923064] do_mprotect_pkey+0x87e/0xd40 [ 38.923594] __x64_sys_mprotect+0x78/0xc0 [ 38.924126] do_syscall_64+0x3f/0x90 [ 38.924606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925266] [ 38.925485] Freed by task 19: [ 38.925873] kasan_save_stack+0x22/0x50 [ 38.926385] kasan_set_track+0x25/0x30 [ 38.926885] kasan_save_free_info+0x2b/0x50 [ 38.927420] __kasan_slab_free+0x10a/0x190 [ 38.927952] kmem_cache_free+0x10d/0x4d0 [ 38.928459] rcu_core+0x8c8/0x2860 [ 38.928902] __do_softirq+0x1b7/0x7d4 [ 38.929386] [ 38.929608] Last potentially related work creation: [ 38.930197] kasan_save_stack+0x22/0x50 [ 38.930697] __kasan_record_aux_stack+0x8e/0xa0 [ 38.931272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931916] remove_vma+0x139/0x170 [ 38.932367] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932921] do_vmi_munmap+0x1f1/0x2b0 [ 38.933425] __vm_munmap+0x138/0x3a0 [ 38.933895] __x64_sys_munmap+0x59/0x80 [ 38.934402] do_syscall_64+0x3f/0x90 [ 38.934881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935528] [ 38.935748] The buggy address belongs to the object at ffff888016a3a2b8 [ 38.935748] which belongs to the cache vm_area_struct of size 168 [ 38.937254] The buggy address is located 88 bytes inside of [ 38.937254] freed 168-byte region [ffff888016a3a2b8, ffff888016a3a360) [ 38.938652] [ 38.938873] The buggy address belongs to the physical page: [ 38.939528] page:000000004163c47a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a3a [ 38.940638] memcg:ffff8880164bcd01 [ 38.941071] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941722] page_type: 0xffffffff() [ 38.942178] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.943094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164bcd01 [ 38.944033] page dumped because: kasan: bad access detected [ 38.944704] [ 38.944919] Memory state around the buggy address: [ 38.945516] ffff888016a3a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.946379] ffff888016a3a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.947243] >ffff888016a3a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.948104] ^ [ 38.948584] ffff888016a3a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.949440] ffff888016a3a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.950294] ================================================================== [ 38.951297] Disabling lock debugging due to kernel taint [ 40.776293] BUG: Bad rss-counter state mm:000000004e447b9d type:MM_FILEPAGES val:33 [ 40.777083] BUG: Bad rss-counter state mm:000000004e447b9d type:MM_ANONPAGES val:22 [ 41.141075] BUG: Bad rss-counter state mm:000000006ebae600 type:MM_FILEPAGES val:33 [ 41.141858] BUG: Bad rss-counter state mm:000000006ebae600 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64495' (ECDSA) to the list of known hosts. 2023/06/21 10:41:21 fuzzer started 2023/06/21 10:41:22 dialing manager at localhost:36067 2023/06/21 10:41:22 checking machine... 2023/06/21 10:41:22 checking revisions... [ 41.860195] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:41:22 testing simple program... [ 41.912092] cgroup: Unknown subsys name 'net' [ 41.972012] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:41:21 Registers: info registers vcpu 0 RAX=0000000000000200 RBX=ffff88801ae90000 RCX=0000000000000000 RDX=0000000000000005 RSI=ffff88807ffdc000 RDI=ffffffff81839db7 RBP=ffff888013f44a80 RSP=ffff888008d9fc80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffab8 R15=ffff888013f44a80 RIP=ffffffff815343b0 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f31c6d55618 CR3=000000000e3cc000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880195a3700 RBX=0000000000000400 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffff88806cf395c0 RDI=ffff88806cf395d4 RBP=ffff88806cf09be8 RSP=ffff88806cf09b60 R8 =0000000000000000 R9 =00000009935f0fa2 R10=ffff88806cf396c0 R11=1ffff1100d9e7479 R12=ffff88806cf395c0 R13=0000000000000004 R14=00000000000013a2 R15=00000009935efc00 RIP=ffffffff81294217 RFL=00000013 [----A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f31c679e900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe668bc000 CR3=000000000e3cc000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000